Continuous ADA sill with quality sidelites

I need a front door and sitelites, with a handicapped ADA threshold/sill that I’d like to be one continuous piece - sidelites and door.

Just last year, I installed a Therma-tru system, without a continuous sill, and the entire project is a disaster: the door warped, the sidelite frame was warped and the mullions wouldn’t fit in properly, the sidelite sills had big gaps and looked horrible with the continuous sill, etc, etc, etc.

Can you recommend several companies that sell quality products, especially with a continuous sill?